<!DOCTYPE html>  
<html lang="en">  
<head>  
    <meta charset="UTF-8">  
    <meta name="viewport" content="width=device-width, initial-scale=1.0">  
    <title>视频播放界面</title>  
    <style>  
        body, html {
			background-image: url('背景图.jpg'); /* 这里填入图片的路径 */
			background-repeat: no-repeat; /* 背景图片不重复 */
			background-size: cover; /* 背景图片覆盖整个页面 */
            margin: 0;  
            padding: 0;  
            width: 100%;  
            height: 100%;  
            display: flex;  
            justify-content: center;  
            align-items: center; /* 使子元素垂直居中 */  
            background-color: #f0f0f0;  
        }  
  
        .video-container {  
            display: flex;  
            flex-direction: column; /* 垂直方向排列子元素 */  
            align-items: center; /* 垂直居中子元素 */  
            width: 90%;  
            max-width: 900px;  
            position: relative;  
			border-radius: 20px;
			border: 50px solid black;
        }  
  
        .video-container video {  
            width: 100%; /* 视频宽度填充容器 */  
            /* 高度由宽高比决定，这里不设置 */  
        }  
  
        .video-info {  
            text-align: center; /* 使标题和描述居中 */  
            margin-top: 20px; /* 与视频下方保持一定距离 */  
        }  
  
        .return-button {  
            position: fixed;  
            bottom: 10%;  
            right: 10%;  
            padding: 10px 20px;  
            background-color: #007bff;  
            color: white;  
            border: none;  
            cursor: pointer;  
            border-radius: 5px; 
			
        }  
  
        .return-button:hover {  
            background-color: #0056b3;  
        }  
    </style>  
</head>  
<body>  
  
<div class="video-container">  
    <video controls>  
        <source src="实验视频.mp4" type="video/mp4">  
        Your browser does not support the video tag.  
    </video>  
    <!-- <div class="video-info">  
        <h2>视频标题</h2>  
        <p>这里是视频的简短描述。</p>  
    </div>  -->
</div>  
  
<button class="return-button" onclick="window.history.back();">返回</button>  
  
</body>  
</html>